How to Configure SharePoint Auditing Using PowerShell in SharePoint Online

Hi,

I want to enable SharePoint audit setting using PS. I am executing following steps. However I am getting below mentioned error.

Note: This command is working fine with my on premise environment. Any help would be appreciated.

Command: 

$site = Get-SPOSite "SiteURL"
$site.Audit.AuditFlags = [Microsoft.SharePoint.SPAuditMaskType]::Update
$site.Audit.Update()

Error:

Unable to find type [Microsoft.SharePoint.SPAuditMaskType]: make sure that the assembly containing this type is loaded.
At line:1 char:1
+ $site.Audit.AuditFlags = [Microsoft.SharePoint.SPAuditMaskType]::Update
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (Microsoft.SharePoint.SPAuditMaskType:TypeName) [], RuntimeException
    + FullyQualifiedErrorId : TypeNotFound